class Employee:
    def __init__(self, name, id_number):
        self.name = name
        self.id_number = id_number

    def sayHello(self):
        print(f"Hello, I'm an employee. My name is {self.name}.")


class CEO(Employee):
    def __init__(self, name, id_number, title):
        super().__init__(name, id_number)  # 调用父类的__init__方法  
        self.title = title

    def sayHello(self):
        # 调用父类的sayHello方法  
        super().sayHello()
        print(f"Hello, I'm a CEO. My name is {self.name} and my title is {self.title}.")

    # 使用示例：


ceo = CEO("Alice", 123, "CEO of the Company")
ceo.sayHello()

# 输出应该类似于：  
# Hello, I'm an employee. My name is Alice.  
# Hello, I'm a CEO. My name is Alice and my title is CEO of the Company.